Things you can do:
-Boycott those that spent hundreds of thousands of dollars to hide what's in your food.
Ask yourself why they don't want to tell you what's in your food.
-Visit their Facebook fan pages and leave your own opinion/thoughts. Educate their users as well.
-Tell your friends
-Join a justlabelit program
-Support those companies that donated to get Proposition 37 passed.
-Contact your representatives to get this initiative on the ballots
-Sign the petition on the White House website

Educate yourself on what GMO's are and how they could be hurting your family.
There are a few facts you should know:
*GMO's have never been tested on humans
*GMO free products are freely available in other countries due to customer demand. Kelloggs could make GMO free cereal, as they do in other countries but they won't for the US.
*Know that most smaller labels are owned by these bigger one.
*This isn't a political movement, this is a PEOPLE movement.